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NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-24240.json","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-24240.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2020-24240","reference_id":"","reference_type":"","scores":[{"value":"0.00239","scoring_system":"epss","scoring_elements":"0.47153","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00239","scoring_system":"epss","scoring_elements":"0.47217","published_at":"2026-06-05T12:55:00Z"},{"value":"0.00239","scoring_system":"epss","scoring_elements":"0.4722","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00239","scoring_system":"epss","scoring_elements":"0.47201","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00239","scoring_system":"epss","scoring_elements":"0.47172","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00239","scoring_system":"epss","scoring_elements":"0.47184","published_at":"2026-06-09T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2020-24240"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24240","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24240"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"3.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://lists.gnu.org/r/bug-bison/2020-07/msg00051.html","reference_id":"","reference_type":"","scores":[],"url":"https://lists.gnu.org/r/bug-bison/2020-07/msg00051.html"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1872737","reference_id":"1872737","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1872737"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2020-24240","reference_id":"CVE-2020-24240","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-24240"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/446774?format=json","purl":"pkg:apk/alpine/bison@3.7.2-r0?arch=ppc64le&distroversion=v3.23&reponame=main","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:apk/alpine/bison@3.7.2-r0%3Farch=ppc64le&distroversion=v3.23&reponame=main"}],"aliases":["CVE-2020-24240"],"risk_score":2.5,"exploitability":"0.5","weighted_severity":"5.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-gvud-7ny5-9qf7"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/107787?format=json","vulnerability_id":"VCID-xhvy-7ect-nyce","summary":"bison: Buffer overflow in src/symtab.c via crafted input file redefining the EOF token can lead to DoS","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-24979.json","reference_id":"","reference_type":"","scores":[{"value":"5.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-24979.json"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1877772","reference_id":"1877772","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1877772"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/446774?format=json","purl":"pkg:apk/alpine/bison@3.7.2-r0?arch=ppc64le&distroversion=v3.23&reponame=main","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:apk/alpine/bison@3.7.2-r0%3Farch=ppc64le&distroversion=v3.23&reponame=main"}],"aliases":["CVE-2020-24979"],"risk_score":null,"exploitability":null,"weighted_severity":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-xhvy-7ect-nyce"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:apk/alpine/bison@3.7.2-r0%3Farch=ppc64le&distroversion=v3.23&reponame=main"}